java8 从对象集合中取出某个字段的集合

public class FeildTest {

public static void main(String[] args) {
//定义list集合
        List<P> list = Arrays.asList(new P(1, "哈哈"), new P(2, "嘿嘿"), new P(3, "呵呵"));
//从list集合中，取出字段name的列表
        List<String> names = list.stream().map(p -> p.getName()).collect(Collectors.toList());

        System.out.println(names);
    }
}
class P{
int id;
    String name;

public P(int id, String name) {
this.id = id;
this.name = name;
    }

public int getId() {
return id;
    }

public void setId(int id) {
this.id = id;
    }

public String getName() {
return name;
    }

public void setName(String name) {
this.name = name;
    }
}